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    Investigation of Effective Groove Types for a Film Riding Seal

    Source: Journal of Engineering for Gas Turbines and Power:;2017:;volume( 139 ):;issue: 007::page 72503
    Author:
    Tibos, S. M.
    ,
    Teixeira, J. A.
    ,
    Georgakis, C.
    DOI: 10.1115/1.4035601
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: Over the past two decades, significant efforts have been made to introduce film riding sealing technology on large industrial or aerospace gas turbines. The main challenge comes from the high surface speeds and high temperatures, which lead to large thermal distortions. One approach to tackle the effect of thermally induced distortion is to design a seal to operate at a large film to limit the viscous heat generation. To design a seal pad that maximizes force at relatively high film heights, it is important to select the seal groove type that looks the most promising to deliver this characteristic. Several groove types have been assessed as part of this study. The most promising groove type is the Rayleigh step, which gives the strongest level of combined hydrostatic and hydrodynamic load support while also being easier to tessellate on individual seal segments. The results generated using a uniform grid Reynolds equation method show reasonable agreement with computational fluid dynamics (CFD) calculations. This provides confidence in the validity of the method, approach, and results.
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      Investigation of Effective Groove Types for a Film Riding Seal

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4233738
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    contributor authorTibos, S. M.
    contributor authorTeixeira, J. A.
    contributor authorGeorgakis, C.
    date accessioned2017-11-25T07:15:55Z
    date available2017-11-25T07:15:55Z
    date copyright2017/14/2
    date issued2017
    identifier issn0742-4795
    identifier othergtp_139_07_072503.pdf
    identifier urihttp://138.201.223.254:8080/yetl1/handle/yetl/4233738
    description abstractOver the past two decades, significant efforts have been made to introduce film riding sealing technology on large industrial or aerospace gas turbines. The main challenge comes from the high surface speeds and high temperatures, which lead to large thermal distortions. One approach to tackle the effect of thermally induced distortion is to design a seal to operate at a large film to limit the viscous heat generation. To design a seal pad that maximizes force at relatively high film heights, it is important to select the seal groove type that looks the most promising to deliver this characteristic. Several groove types have been assessed as part of this study. The most promising groove type is the Rayleigh step, which gives the strongest level of combined hydrostatic and hydrodynamic load support while also being easier to tessellate on individual seal segments. The results generated using a uniform grid Reynolds equation method show reasonable agreement with computational fluid dynamics (CFD) calculations. This provides confidence in the validity of the method, approach, and results.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleInvestigation of Effective Groove Types for a Film Riding Seal
    typeJournal Paper
    journal volume139
    journal issue7
    journal titleJournal of Engineering for Gas Turbines and Power
    identifier doi10.1115/1.4035601
    journal fristpage72503
    journal lastpage072503-8
    treeJournal of Engineering for Gas Turbines and Power:;2017:;volume( 139 ):;issue: 007
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
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